Alert archive / Louisiana / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 116, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 30, 2005, 3:46 AM CDT for Ascension Parish, Iberville Parish, Louisiana. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 30, 2005, 3:46 AM CDT (08:46 UTC)
- Expired
- May 30, 2005, 4:15 AM CDT
- In force
- 29 min
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
Counties Ascension Parish, LA, Iberville Parish, LA
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 30, 2:25 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 8.8 hours before the alert went out and 137 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 26 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1335 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 2:20 AM CDT, 1 hour 26 minutes earlier.
Area forecast discussion, May 30, 2:20 AM CDT, 1 hour 26 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 220 PM CDT MON MAY 30 2005 .DISCUSSION... AVN/GFS AND ETA MODELS SIMILAR FOR FIRST 18 HOURS. THEREAFTER ETA SHOWS 500MB SHORT WAVE DEEPENING AND SLOWING DOWN OVER SOUTHWEST LA WHILE GFS TRACKS THE TROUGH EASTWARD. THE ETA HANGS THE SYSTEM UP OVER LA WITH A NEGATIVE TILT AXIS TUEDSAY NIGHT AND TRACKS THE TROUGH NORTHEAST INTO NORTHERN MS WEDNESDAY. WITH NEXT LOW MOVING INTO NORTHERN ROCKIES MONDAY NIGHT/TUESDAY AM EXPECT THIS TO HELP KICK THE TROUGH OVER LA/MS EASTWARD SIMILAR TO GFS SOLUTION...BUT WILL ADD POPS IN FOR WEDNESDAY TO COVER THE EVENTUALITY OF A SLOWER MOVEMENT. REMAINDER OF FORECAST LEFT AS IS. AREAS IN SOUTHEAST LA AND SOUTHERN MS HAVE RECEIVED OVER 3 INCHES OF RAINFALL IN THE LAST 18 HOURS WITH A FEW SPOTS RECORDING OVER 5 INCHES. SATELLITE AND RADAR SHOW ANOTHER IMPULSE BEING EJECTED EASTWARD. WITH PRECIPITABLE WATER LEVELS NEAR 2 INCHES OVER THE CWA AND POTENTIAL FOR STRONG THUNDERSTORM DEVELOPMENT...WILL ISSUE A FLASH FLOOD WATCH FOR THE CWA. UPPER LEVEL DYNAMICS STILL LOOK GOOD FOR ISOLATED SEVERE CONVECTION TODAY. && .PRELIMINARY POINT TEMPS/POPS... MCB 82 69 83 66 / 90 80 60 20 BTR 84 71 86 68 / 100 70 60 20 MSY 85 74 85 73 / 90 80 70 20 GPT 82 70 82 70 / 90 80 70 20 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...FLASH FLOOW WATCH...ALL SE LA PARISHES TODAY AND TONIGHT. MS...FLASH FLOOD WATCH...SOUTHWEST AND EXTREME SOUTH MS COUNTIES. SE LA AND MS COASTAL WATERS...NONE. &&
In the hours before
Special weather statement, May 29, 10:20 PM CDT, 5 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1020 PM CDT SUN MAY 29 2005 LAZ049-050-300425- ASCENSION-LIVINGSTON- 1020 PM CDT SUN MAY 29 2005 ...STRONG THUNDERSTORMS AFFECTING ASCENSION AND LIVINGSTON PARISHES... STRONG THUNDERSTORMS EXTENDING ACROSS ASCENSION PARISH FROM DONALDSONVILLE TO GONZALES TO PRAIRIEVILLE AND IN LIVINGSTON PARISH FROM DENHAM SPRINGS TO THE TOWN OF LIVINGSTON WILL CONTINUE TO AFFECT AREAS ACROSS THESE PARISHES THROUGH 1130 PM CDT. THESE THUNDERSTORMS WILL PRODUCE FREQUENT LIGHTNING...GUSTY WINDS AND HEAVY DOWNPOURS OF RAIN THAT MAY RESULT IN STREET FLOODING AND PONDING OF WATER IN LOW LYING AREAS. 11
Special weather statement, May 29, 11:23 PM CDT, 4 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1123 PM CDT SUN MAY 29 2005 LAZ034>040-046>050-056>058-MSZ068>070-300500- AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-IBERVILLE- LIVINGSTON-PIKE-POINTE COUPEE-ST HELENA-ST JAMES-ST JOHN THE BAPTIST- ST TAMMANY-TANGIPAHOA-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA- WILKINSON- 1123 PM CDT SUN MAY 29 2005 ...SEVERE THUNDERSTORM WATCH NUMBER 350 HAS BEEN CANCELED... THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR ANY PORTION OF EXTREME SOUTHWEST MISSISSIPPI OR SOUTHEAST LOUISIANA. ALTHOUGH THUNDERSTORMS WILL BE POSSIBLE THROUGH THE NIGHT...THE THREAT OF SEVERE WEATHER HAS DIMINISHED. 11
Special weather statement, May 30, 12:23 AM CDT, 3 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1223 AM CDT MON MAY 30 2005 LAZ063-064-068>070-300645- LOWER JEFFERSON-LOWER PLAQUEMINES-LOWER ST BERNARD-UPPER PLAQUEMINES- UPPER ST BERNARD- 1223 AM CDT MON MAY 30 2005 ...STRONG THUNDERSTORMS AFFECTING COASTAL AREAS OF EXTREME SOUTHEAST LOUISIANA... THUNDERSTORMS WILL CONTINUE TO AFFECT AREAS OF ST. BERNARD... PLAQUEMINES...AND JEFFERSON PARISHES THROUGH 2 AM CDT. THESE THUNDERSTORMS WILL PRODUCE FREQUENT LIGHTNING...GUSTY WINDS... AND HEAVY DOWNPOURS OF RAIN. THE HEAVIEST RAINFALL WILL LIKELY REMAIN NEAR THE COAST AND MAY RESULT IN LOCALIZED FLOODING OF ROADWAYS AND LOW LYING AREAS. 11
Special weather statement, May 30, 1:41 AM CDT, 2 hours 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 141 AM CDT MON MAY 30 2005 LAZ034>036-046>048-MSZ068-300815- EAST BATON ROUGE-EAST FELICIANA-IBERVILLE-POINTE COUPEE- WEST BATON ROUGE-WEST FELICIANA-WILKINSON- 141 AM CDT MON MAY 30 2005 ...THUNDERSTORMS WILL AFFECT AREAS OF EAST CENTRAL LOUISIANA AND SOUTHWEST MISSISSIPPI DURING THE EARLY MORNING HOURS... THUNDERSTORMS WILL AFFECT AREAS EXTENDING FROM BATON ROUGE AND PLAQUEMINE WEST TO THE ATCHAFALAYA RIVER AND NORTH TO THE HOMOCHITTO NATIONAL FOREST IN WILKINSON COUNTY MISSISSIPPI THROUGH 330 AM CDT. THESE THUNDERSTORMS WILL PRODUCE FREQUENT LIGHTNING...GUSTY WINDS...AND HEAVY DOWNPOURS OF RAIN. LOCALIZED FLOODING OF SOME ROADWAYS AND LOW LYING AREAS MAY OCCUR WITH THE THUNDERSTORMS. 11
Local storm report, May 30, 2:28 AM CDT, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
228 AM CDT MON MAY 30 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 AM TSTM WND DMG LETTSWORTH 30.93N 91.70W
05/30/2005 POINTE COUPEE LA EMERGENCY MNGR
A FEW TREES WERE REPORTED DOWN ON LOUSIANA HIGHWAY 1.
&&
REPORTED BY SHERRIFS OFFICE.
PGRIGSBYLocal storm report, May 30, 3:38 AM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
338 AM CDT MON MAY 30 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0311 AM TSTM WND DMG 1 S JACKSON 30.82N 91.21W
05/30/2005 EAST FELICIANA LA EMERGENCY MNGR
LAW ENFORCEMENT REPORTS A FEW TREES DOWN ON LOUISIANA
HIGHWAY 68 NEAR THE STATE PRISON.
&&
PGRIGSBYThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:21 PM CDT | Special Marine Warning | LIX | 84 min | |
| May 29, 9:05 PM CDT | Special Marine Warning | LIX | 55 min | |
| May 29, 9:22 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 113 min |
| May 29, 10:39 PM CDT | Flash Flood Warning | LIX | Ascension | 3 hr |
| May 29, 11:07 PM CDT | Flash Flood Warning | LIX | Livingston | 3 hr |
| May 29, 11:30 PM CDT | Special Marine Warning | LIX | 90 min | |
| May 30, 12:59 AM CDT | Special Marine Warning | LIX | 91 min | |
| May 30, 2:21 AM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 24 min |
| May 30, 2:42 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, West Baton Rouge, West Feliciana | 48 min |
| May 30, 3:20 AM CDT | Special Marine Warning | LIX | 85 min | |
| May 30, 5:34 AM CDT | Special Marine Warning | LIX | 86 min | |
| May 30, 5:39 AM CDT | Tornado Warning | LIX | Saint Tammany | 51 min |
| May 30, 10:24 AM CDT | Special Marine Warning | LIX | 2 hr | |
| May 30, 12:35 PM CDT | Special Marine Warning | LIX | 55 min | |
| May 30, 12:49 PM CDT | Special Marine Warning | LIX | 116 min | |
| May 29, 7:42 PM CDT | Tornado Warning | LIX | Walthall | 50 min |
| May 29, 7:44 PM CDT | Flash Flood Warning | LIX | Hancock | 2 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2005Every severe thunderstorm warning in 2005
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.